<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Title</title>
    <style type="text/css">
        table{
            margin: auto;
        }
    </style>
</head>
<body>
<table width="60%" border="1px" cellpadding="0px" cellspacing="0px">
    <tr align="center">
        <td>1</td>
        <td>2</td>
        <td>3</td>
    </tr>
    <tr align="center">
        <td>1</td>
        <td>2</td>
        <td>3</td>
    </tr>
</table>
</body>
</html>